80864515840 has 36 divisors (see below), whose sum is σ = 193695788664. Its totient is φ = 32345805824.

The previous prime is 80864515813. The next prime is 80864515843. The reversal of 80864515840 is 4851546808.

It is a super-2 number, since 2×80864515840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80864515843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31586422 + ... + 31588981.

It is an arithmetic number, because the mean of its divisors is an integer number (5380438574).

Almost surely, 2^80864515840 is an apocalyptic number.

80864515840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80864515840 is an abundant number, since it is smaller than the sum of its proper divisors (112831272824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80864515840 is an equidigital number, since it uses as much as digits as its factorization.

80864515840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63175424 (or 63175410 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 49.

The spelling of 80864515840 in words is "eighty billion, eight hundred sixty-four million, five hundred fifteen thousand, eight hundred forty".